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Finding the Fourth Proportional to 1,199.84, 1,799.84 and 378.11

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Solution

The fourth proportional to 1,199.84, 1,799.84 and 378.11 is: 567.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,199.84 : 1,799.84 = 378.11 : x
  2. Step 2: Convert to fraction form
    1,199.84/1,799.84 = 378.11/x
  3. Step 3: Cross multiply
    1,199.84x = 1,799.84 × 378.11
  4. Step 4: Simplify right side
    1,199.84x = 680,526.61
  5. Step 5: Solve for x
    x = 680,526.61/1,199.84
  6. Step 6: Final answer
    x = 567.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.